PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 302
![no-image](/images/no-image-200.jpg)
PEB2085
Manufacturer Part Number
PEB2085
Description
ISDN SubscribernAccess Controller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PEB2085.pdf
(320 pages)
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}
else
if (pt->pt_rx_frame < PT_FR_ERROR)
{
}
if (rpf)
{
}
rsta = inp (pt->pt_r_rsta);
/************************************************************************/
/* It follows a scanning section to get some information about the
/* received data:
/* - Performed address recognition
/* - SAPI (’sapi’), TEI (’tei’) and control field byte(s) (’ctrl’)
/*
/*
/* In addition the length of a frame is checked.
/************************************************************************/
pei
AutoM
tei
sapi
ptr
switch (pt->pt_op_mode)
{
if (pt->pt_rx_cnt > 266)
if (RecCnt)
{
}
outp (pt->pt_r_cmdr, CMDR_RMC | (inp (pt->pt_r_star) & CMDR_RNR));
return;
case PT_MD_CLEAR_EXT:
pt->pt_rx_frame = PT_FR_OVERFLOW;
STRING_IN (pt->pt_rx_curr, pt->pt_r_fifo, RecCnt);
pt->pt_rx_curr += RecCnt;
as well as the type of frame (HDLC U, UI, S or I frame) are
determined.
|= ((rsta & 0x0C) >> 1) | (rsta & 0x01);
= FALSE;
= 0;
= rsta & 0x02;
= pt->pt_rx_start;
/* read the bytes from the RFIFO
/* if no error was detected
/* update buffer pointer
/* it points to the next free
/* location in the buffer
/* return when it was a RPF int.
/* RME interrupt handling !!!
/* ==========================
/* the receive status byte is in
/* register RSTA
/* set ’pei’ according to performed */
/* address recognition
/* get the C/R bit value
/* now get additional information
/* (TEI, SAPI, control field)
/* It depends on the selected
/* operating mode
/* no address recognition,
/* no firmware interaction
302
Low Level Controller
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
*/
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